供应RTL8370/RTL8370M Layer 2 Managed 10/100/1000 Switch Controllers

The RTL8370 is an LQFP128 E-PAD, high-performance 8-port Gigabit Ethernet switch, and the RTL8370M is a TQFP176 E-PAD, high-performance 8+2-port Gigabit Ethernet switch. 
Both the RTL8370 and RTL8370M feature low-power integrated 8-port Giga-PHYs that support 1000Base-T, 100Base-T, and 10Base-T.
The RTL8370M supports two extra GMII/RGMII/MII ports for specific applications. The RTL8370 and RTL8370M integrate all the functions of a high-speed switch system; including SRAM for packet buffering, non-blocking switch fabric, and internal register management into a single CMOS device. Only a 25MHz crystal is required; an optional EEPROM is offered for internal register configuration.
The embedded packet storage SRAM in the RTL8370(M) features superior memory management technology to efficiently utilize memory space. The RTL8370(M) integrates an 8K-entry look-up table with a 4-way XOR Hashing algorithm for address searching and learning. The table provides read/write access from the EEPROM Serial Management Interface (SMI), and each of the entries can be configured as a static entry. The entry aging time is between 200 and 400 seconds. Eight Filtering Databases are used to provide Independent VLAN Learning and Shared VLAN Learning (IVL/SVL) functions.
Unfinished file and contains much errors. Do not use for anything. The Extension GMAC0 and Extension GMAC1 of the RTL8370M implement dual GMII/RGMII/MII interfaces for connecting with an external PHY or MAC in specific applications. This interface could be connected to an external CPU or RISC as 8-port Gigabit Router applications. In router applications, the RTL8370(M) supports Port VID (PVID) for each port to insert a PVID in the VLAN tag on egress. When using this function, VID information carried in the VLAN tag will be changed to PVID.
Note: The RTL8370M (only) Extra Interface (Extension GMAC0 and Extension GMAC1) supports:
Gigabit Media Independent Interface (GMII)
Reduced Gigabit Media Independent Interface (RGMII)
Media Independent Interface (MII)
 
The RTL8370(M) supports standard 802.3x flow control frames for full duplex, and optional backpressure for half duplex. It determines when to invoke the flow control mechanism by checking the availability of system resources, including the packet buffers and transmitting queues. The RTL8370(M) supports broadcast/multicast output dropping, and will forward broadcast/multicast packets to non-blocked ports only. For IP multicast applications, the RTL8370(M) supports IPv4 IGMPv1/v2/v3 and IPv6 MLDv1/v2 snooping.
In order to support flexible traffic classification, the RTL8370(M) supports 64-entry ACL rule check and multiple actions options. Each port can optionally enable or disable the ACL rule check function. The ACL rule key can be based on packet physical port, Layer2, Layer3, and Layer4 information. When

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